Think about the last online ad you clicked.
Did you assume it was genuine? If so, you’re not alone and that’s exactly what scammers are counting on.
Malvertising (short for malicious advertising) is a growing threat to businesses of all sizes. It’s a tactic where cybercriminals use online ads to trick you into downloading harmful software, handing over sensitive information, or even transferring money. And here’s the worst part, sometimes, you don’t even need to click. Just loading the page in an outdated browser can be enough to let the malware in.
Let’s break down the three most common types of malvertising attacks:
1. Scam Malvertising
These ads claim your computer is infected and urge you to call for support. On the call, scammers convince you to install software that gives them remote access to your system. Then they charge you to “fix” the fake issue, often locking you out or stealing your data in the process.
2. Fake installer Malvertising
You see an ad for a trusted piece of software, maybe even one you’ve used before. But when you click, it takes you to a fake version of the site. You download what looks like a real program, but it’s actually malware.
3. Drive-by download Malvertising
You don’t click anything. You just visit a site with a malicious ad, and your outdated browser silently downloads malware in the background. No warning, no prompt just compromise.
What can you do?
Stay sceptical. If an ad says you’ve been hacked or urges you to take action immediately, pause. Ask yourself: How would this company know about my device?
Check the link. Hover over URLs before clicking. If it looks suspicious or doesn’t match the company’s official domain, steer clear.
Update your browser. Always run the latest version. Security updates patch the exact vulnerabilities that malvertisers exploit.
Educate your team. Your employees are your first line of defence. A trained team that knows what to look for is far less likely to fall victim to these scams.
Final Thought
Malvertising works because it preys on trust. But trust without thinking is risky. Next time you see an ad that feels “off,” listen to that instinct. A moment’s pause could save your business from a costly cyber incident.
